Combined slitting and crushing device



May 7, 1935. R. M CL'JOHNSTONE in AL 2,000,175

COMBINED SLITTING AND CRUSHING DEVICE Filed Aug. 9, 1954 JNVE T0 5 A TTORNE Y.

Patented May 7, 1935 4 V UNITED STATES COMBINED SLITTING AND CBUSHING DEVICE 1 Robert McG. Johnstone, Short Hills, and Leopold C. Borloz, West-Englewood, N. 1., assignors to Cameron Machine Company, Brooklyn, N. I, a corporation of New York 7 Application August 9, 1934, Serlal'No. 739,088

7 Claims. (Cl.16465 This invention relates to a combined slitting and crushing device for webs of flexible material, and has for its main object and feature the production of such a device of simple and effective construction.

In the accompanying drawing the invention is disclosed in several concrete and preferred forms in which:

Fig. 1 is a view partly in elevation and partly in section of a slitting and crushing device embodying the invention; j Fig. 2 is a vertical sectional viewsubstantially on the plane of line 22 of Fig. 1;v Fig. 3 is view similar to Fig. 1 showing a modified form of the invention; and

Fig. 4 is a vertical sectional view substantially on the plane of line 4-4 of Fig. 3.

I indicates a backing member consisting of a smooth face roller having a glass-hard surface over which passes a web of flexible material 2 such as bandage material. The device slits this material into strips of suitable widths, after which the strips are wound into rolls or coils in a-well-known manner. In order to prevent unraveling of the edges of the slitted material it is customary to crush the slitted edges, and the present invention constitutes an improvement on a combined slitting and crushing device.

Referringto Figs. 1 and 2, 3 indicates a carrier pivotally supported onrail 4 which rail is movable toward and away from the backing member by suitable means such as eccentric 5. 6 is a leaf spring which is anchored at 'l on the framework and which is placed under tension when the. carrier is moved toward the backing member. Said carrier is provided with a 'slot 8 in which is mounted a pintle 9, and on the latter is mounted a crushing element consisting of two crushing wheels i0 spaced apart by means of washer H. Interposed between the pintle and the crushing wheels is an anti-friction device here shown as a ball-bearing I2. Pivotally supported on main carrier 3 is an auxiliary carrier l3, the pivotal point being at H, and rotatably supported on the auxiliary carrier are one or more rollers l5. Adjustable spring 16 tends to urge the rollers in an upward direction in Fig. 1. Interposed between the crushing rollers and peripherally engaged by rollers I5 is a slitting element, here consisting of a score-cut slitter wheel I! and having a central opening ll of larger diameter than the outside diameter of washer l I. It will now'be understood that when the device is moved toward the backing member, the springs of both carriers are placed under tension so that the web as it passes-around the backing roller is'slitted and simultaneously therewith the slitted edges are crushed. Rollers I 5 may be smooth face rollers or they may be provided with a groove I 9 that reconditions or sharpens the slitting element. It will also be understood that a number of these combined slitting-and crushing devices may be mountedon rail 4. I

In Figs. 3 and 4, the reverse arrangement is shown. Here the main carrier 20 is mounted and spring-pressed as before but carries, by

means of ball-bearing 2|, slitting element 22,

which auxiliary carrier 23 and rolls 24 support the crushing rolls 25. V

The relative strength of springs 6. and [6 should be such that the net effectiveness of the spring that controls the crushing rollers is greater than that which controls the slitter.

We claim: v

1. A combined slitting and crushing device for webs of flexible material including in combination with a backing member: a crushing element comprising'a pair of rotatable crushing wheels spaced apart and adapted to engage and crush the'adjacent slitted edges of a web-of flexible material as said web passes in contact with the backing member; a slitting. element comprising a rotatable score-cut slitter centrally disposed between the crushing wheels to-slit said flexible material against the backing member; two spring-pressed means, one for the crushing element and the other for the slitting element, and one of which engages the periphery of one of said elements; and means to move the device toward the backing member to thereby place both spring-pressed means under tension.

2. A combined slitting and crushing device for webs of flexible material including in combination with a backing member: a crushing element comprising a pair of rotatable crushing wheels spaced apart and adapted to engage and crush the adjacent slitted edges of a web of flexible material as said web passes in contact with the backing member; a slitting element comprising a rotatable score-cut slitter centrally disposed between the crushing wheels to slit said flexible material against the backing memher; a pivotally supported and spring-pressed main carrier for one of said elements; an auxiliary spring-pressed carrier pivotally mounted on the main carrier for the other of said elements; and means to move the main carrier bination with a toward the backing member to thereby place both carriers under spring tension. 7 3. A combined slitting and crushing/device for webs of flexible material including in combination with a backing member: a crushing element comprising a pair of rotatable crushing wheels spaced apart and adapted to engage and crush the adjacent slitted edges of a web of flexible material as said web passes in contact with the backing member; a slitting element comprising a rotatable score-cut slitter centrally disposed between the crushing wheels to slit said flexible material ber; a pivotally supported and spring-pressed main carrier to support the slitting element; an auxiliary spring-pressed carrier pivotally mounted on the main carrier to support the crushing element; and means to move the main carrier toward the backing member to thereby place both carriersunder spring tension.

4. A combined slitting and crushing device for webs of flexible material including in combacking member: a crushing element comprising a pair of rotatable crushing wheels spaced apart and adapted to engage and crush the adjacent slitted edges of a web of flexible material as said web passes in contact with the backing member; a slitting element comprising a rotatable score-cut slitter centrally disposed between the crushing wheels to slit said flexible material against the backing member; a pivotally supported and spring-pressed main carrier to support the crushing element; an auxiliary spring-pressed carrier pivotally mounted on the main carrier to support the slitting element; and means tomove the main carrier toward the backing member to thereby place both carriers under tension.

5. A combined slitting and crushing device for webs of flexible material including in combination with a backing member: a crushing element comprising a pair of rotatable crushing wheels spaced apart and adapted to engage and crush the adiacent slitted edges of a web of flexible material as said web passes in contact with the backing member; a slitting element comprising a rotatable score-cut slitter central- 1y disposed between said flexible material against the backing memcarriers one of which webs or flexible against the backing memwith the backing member;

the-crushing wheels to slit supported and spring-pressed is mounted on the other, one carrier for the crushing element and the ether for the slitting element; rotatable means on one of the said carriers to engage the periphery of one of said elements; and means to move the carriers toward the backing member to thereby place both carriers under spring tension.

6. A combined slitting and crushing device for material including in combination with a backing member: a crushing element comprising a pair of rotatable crushing wheels spaced apart and adapted to engage and crush the adjacent slitted edges ot a web of flexible material as said web passes in contact a slitting element comprising a rotatable score-cut slitter centrally disposed between the crushing wheels to slit said flexible material against the backing member; two pivotally supported and spring-pressed carriers one of which is mounted on the other, one carrier for the crushing element and the other for the slitting element; rotatable means on one of said carriers to engage the periphery ber; two pivotally oi the slitting element; and means to move the flexible material as said web passes in contact with the backing member; a slitting element comprising a rotatable score-cut slitter central- 1y disposed between the crushing wheels to slit said flexible material against the backing memher; two pivotally supported and spring-pressed carriers one of which is mounted on the other, one carrier ior the crushing element and the other for the slitting element; rotatable means on one of said carriers to engage the periphery of the crushing element; and means to move the carriers toward the backing member to thereby place both carriers under spring tension. ROBERT McC. JOHNSTONE.

LEOPOLD C. BORDOZ. 

